Chứng minh: nếu 1 tam giác có đường phân giác và đường trung trực xuất phát từ cùng 1 đỉnh của tam giác bằng nhau thì tam giác đó là tam giác cân

Trên hệ trục tọa độ Oxy với đơn vị trên 2 trục bằng nhau cho các điểm A(1;5), B(3;1), C(-3;-3).

1) vẽ hệ trục tọa độ Oxy và các điểm A, B,C

2) viết phương trình đường thẳng OA

3) tính diện tích tam giác ABC nếu biết đơn vị trên các trục là 1cm.

mọi người giúp mik với, mik đang cần gấp.........

cho \(\Delta\) ABD vuông tại A. Kẻ AH\(\perp BC\). Từ H kẻ HD\(\perp\)AB, HE\(\perp\)AC.

a) Chứng minh AH= DE

b) Gọi K là giao điểm của AH và DE. Chứng minh: KA= KH, KD= KF.

c) chứng minh góc ADE = góc ACB

viết lại câu

1. he is not strong enough to do that job.

=> he is too............

1)chọn đáp án đúng

In the spring of 1891, a young Canadian named James Nailsmith .............(1) the staff of the international YMCA Training Schoolin Springfield, MAssachusetts,where he was instucted to devise an (2)...........gam that did not(3) .........bodily contact, would not(4)......in damage to the gym and in which every player had a(5)......to get in on the action. The game he invented was basketball-or basket baall as it was called until about 1912. Nailsmith hung peach basekets at(6)... end of the gym and used a soccer ball to play with. the first game, in december 1891, was played (7)..... two teams of nine men each and was not exactly a classic. the final(8)...... was 1-0.(9)........an off-season recreation, basketball took off in a big way, largely because it was cheap and easy to(10)......up.

1. A. enrolled B. joined C. entered D. became

2. A. inside B.internal C. indoor D. interior

3. A.contain B. consit C. belong D. involve

4. A.cause B. result C. end D. lead

5. A. chance B. possibility C.challenge D.part

6. A. opposite B.both C.either D.double

7. A. against B. among C. from D. between

8. A. goal B. score C. shot D. point

9. A.as B. Such C. Like D. Yet

10. A. get B. play C. set D. do

2) cách phát âm khác

1. A. plays B. says C. days D. stays

2. A. classes B. houses C. glasses D. buses

3. A. dressed B.guessed C.practised D. amused

4. A. daily B. maize C. dairy D.laid

cho dạng đúng của từ

1.look at the (advertise) !what are the about.

2. some students are following the -----------------to the video room.(library)

3. jane likes to wear --------------------clothes( colour)

4. a balanced diet is not enough for a healthy ___________( life)

dùng từ gợi ý viết thành câu:

1.we/ can/ prevent/cold/by/eat well/exercise.

2. walking /fun/ easy and inexpensive activity.

3. most/wold's surface / water.

sắp xếp

1. have/ the farm/ often/ them/vegetables/ from/dirt/on.

2. eat/ enjoy/you/shouldn't/you/much/can/you/the /food/but/too/have.

3. satellite/possble/ from/variety/ programs/with/cable/ it's/choose/wide/of/and/to/a/tv

viết lại câu

1. he is not strong enough to do that job.

=> he is too............

viết lại câu:

1.this lesson is the most difficult of those.

=> no lessons of those..........

2. she can't have any more children because of her age.

=> she is too.........

3. He borrowed the money from the bank.

=> the bank...........

4. The suitcase was too heavy for him to carry.

=> it was such............

5. to see different cultures and ways of life is interesting.

=> how interesting..............

6. he didn't know where tom was and i didn't either.

=> neither he..........

7. the weather was so bad that we couldn't go for a drive.

=> the weather wasn't .........................

tìm lỗi sai:

1. i remember that i have something new to told you.

2. it's important for every students to have a book.

3. he stopped smoking because smoking cigarettes are harmful to his health

4. My father along with his friends are drinking tea in the living room